OBJECTIVES: We report one case of left adrenal tumor discovered during the study of an infiltrating bladder car-cinoma. We discuss the diagnostic and therapeutic implications of the clinical case.METHODS: Surgical procedure was undertaken with radical cystectomy and Bricker’s type urinary diversion, plus adenomectomy by anterior approach.RESULTS: The pathologic report showed a myelolipoma. CONCLUSIONS: Most adrenal tumors are benign, mainly if they are small and non-functioning. The protocol of hormonal study should include potassium and catecholamines. Tumors greater than 6 cm and functioning masses are indications for surgery. For oncological patients, surgical approach of the lesion is indicated if there is not evidence of dissemination.